Introduction

Mold nitrogen gas springs play a critical role in the mold industry, ensuring precise operations and product quality. However, fractures in these springs can have severe consequences for both production efficiency and product integrity. This article delves into the analysis of factors contributing to the fracture of mold nitrogen gas springs.

Root Cause Analysis

The fracture of mold nitrogen gas springs can stem from various factors, including:

1. Inadequate Spring Core Shaft Size: Insufficient core shaft size or horizontal placement of the spring leading to wear and eventual fracture.
2. Improper Core Shaft Dimensions and Assembly Surfaces: Incorrect core shaft dimensions, uneven assembly surfaces, or misaligned positioning surfaces can cause localized high-pressure areas and lead to fracture.
3. Insufficient Core Shaft Length and Lack of Chamfer: An inadequate core shaft length and a lack of chamfering on the ends can result in friction wear between the spring and core shaft, leading to fracture.
4. Foreign Matter Between Spring Coils: The presence of foreign matter between spring coils can reduce the effective coil count, generating high stress and resulting in fracture.
5. Improper Series Connection and Load Distribution: Connecting springs in series can lead to bending and uneven load distribution, causing weaker springs to undergo excessive compression and fracture.
6. Excessive Compression Beyond Design Limits: Utilizing the springs beyond their designed compression limits generates high stress and contributes to fracture.
7. Inhomogeneous Material and Impurities: Inhomogeneous material composition or excessive impurities can cause stress concentration and eventual fracture.
8. Overheating, Corrosion, and High Hardness: Overheating, corrosion, excessive hardness, or excessive stress during manufacturing can reduce tensile and compressive strength, leading to fracture.

Solutions

To prevent fractures in mold nitrogen gas springs, the following measures are recommended:

1. Select Appropriate Core Shaft Size: Choose the right core shaft size to avoid wear.
2. Ensure Proper Core Shaft Dimensions and Assembly Surfaces: Ensure proper core shaft dimensions, even assembly surfaces, and parallel positioning surfaces.
3. Chamfer Core Shaft Ends: Properly chamfer the ends of the core shaft to minimize friction wear.
4. Keep Springs Clean and Free of Foreign Matter: Maintain spring coils free of foreign particles to prevent stress concentration.
5. Optimize Series Connection and Load Distribution: Design spring series connection and load distribution carefully to prevent uneven stresses.
6. Stay Within Design Compression Limits: Avoid exceeding the maximum designed compression limit to prevent excessive stress.
7. Ensure Material Homogeneity: Use materials with uniform composition and minimal impurities.
8. Control Manufacturing Processes: Ensure proper heat treatment, avoid overheating, corrosion, and excessive hardness during manufacturing.

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